<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="https://cdn.bootcdn.net/ajax/libs/jquery/3.6.0/jquery.js"></script>
</head>
<body>
<button onclick="gotoAjax()">点我ajax</button>

<button id="jqajax">点我jq</button>
</body>

<script src="13.js"></script>
</html>
